def hanoi (a,b,c,n=None):
  print a,b,c
  if n==None: n=len(a)
  if n==1: b.insert(0,spezza(a))
  else:
    hanoi(a,c,b,n-1); hanoi(a,b,c,1)
    hanoi(c,b,a,n-1)
---------------------------------------
a=range(0,4); b=[]; c=[]
hanoi(a,b,c)
print a,b,c
# Output:

[0, 1, 2, 3] [] []
[0, 1, 2, 3] [] []
[0, 1, 2, 3] [] []
[0, 1, 2, 3] [] []
[1, 2, 3] [] [0]
[0] [1] [2, 3]
[2, 3] [] [0, 1]
[0, 1] [2] [3]
[0, 1] [3] [2]
[1] [2] [0, 3]
[0, 3] [1, 2] []
[3] [] [0, 1, 2]
[0, 1, 2] [3] []
[0, 1, 2] [] [3]
[0, 1, 2] [3] []
[1, 2] [] [0, 3]
[0, 3] [1] [2]
[2] [3] [0, 1]
[0, 1] [2, 3] []
[0, 1] [] [2, 3]
[1] [2, 3] [0]
[0] [1, 2, 3] []
[] [0, 1, 2, 3] []
---------------------------------------
cogen1 = {'Gly' : 'ggg gga ggc ggt',
  'Ala' : 'gcg gca gcc gct',
  'Val' : 'gtg gta gtc gtt',
  'Leu' : 'ctg cta ctc ctt ttg tta',
  'Ile' : 'ata atc att',
  'Ser' : 'tcg tca tcc tct agc agt',
  'Thr' : 'acg aca acc act',
  'Cys' : 'tgc tgt', 'Met' : 'atg',
  'Asp' : 'gac gat', 'Glu' : 'gag gaa',
  'Asn' : 'aac aat', 'Gln' : 'cag caa',
  'Phe' : 'ttc ttt', 'Tyr' : 'tac tat',
  'Lys' : 'aag aaa', 'His' : 'cac cat',
  'Trp' : 'tgg',
  'Arg' : 'cgg cga cgc cgt agg aga',
  'Pro' : 'ccg cca ccc cct',
  'STOP' : 'tga tag taa'}

cogen = {}
for amina in cogen1.keys():
  v=cogen1[amina].split()
  for x in v: cogen[x]=amina

dna='ttagattgcttggagtcatacttagataca'
n=len(dna)

for i in xrange(0,n,3):
  tripla=dna[i:i+3]
  print cogen[tripla],

# Output scritto su due righe:

Leu Asp Cys Leu Glu
Ser Tyr Leu Asp Thr
---------------------------------------
stipendi = {('Rossi','Trento') : 4000,
('Rossi','Roma') : 8000,
('Gardini','Pisa') : 3400}

stipendi[('Neri','Roma')]=4500

voci=list(stipendi.keys())
voci.sort()
for x in voci:
  print '%-s %7s %d' \
    %(x[0],x[1],stipendi[x])

# Output:

Gardini Pisa    3400
Neri    Roma    4500
Rossi   Roma    8000
Rossi   Trento  4000
---------------------------------------
diz = {'a' : 1, 'b' : 2, 'c' : 3,
  'd' : 4, 'x' : 5, 'y' : 6, 'z' : 7}

print diz.items()
# Output che riscriviamo su
# piu' righe:

[('a', 1), ('c', 3), ('b', 2),
('d', 4), ('y', 6), ('x', 5),
('z', 7)]